Oden to undergo knee procedure

PORTLAND, Ore. (AP) The Trail Blazers say center Greg Oden underwent an arthroscopic procedure Friday to ``remove debris'' from his right knee, his fourth surgery since Portland selected him with the No. 1 pick in the 2007 draft.

The often-injured 7-footer had microfracture surgery on the same knee before the start of his rookie season, forcing him to postpone his NBA debut for a year.

Since then, Oden has appeared in just 82 career games for the Blazers, averaging 9.4 points and 7.3 rebounds.

Oden hasn't appeared in a game for the Blazers in two years. He also underwent surgery for a fractured kneecap in late 2009, then early last season he had microfracture surgery on his left knee.

The latest procedure took place Friday afternoon in Vail, Colo. The Blazers said it was successful and that Oden remains out indefinitely.